1 definition by Xenu.net
A religous cult who's beliefs revolve around an intergalactic warlord named "Xenu" who nuked a bunch of aliens here on Earth billion of years ago. The souls of these aliens, called "Thetans", now inhabit our bodies and make us unhappy. The only way to get rid of these "Thetans" is to pay a bunch of money to these con men for the rest of your life.
by Xenu.net October 23, 2003